"On the south side shall be the standard of the forces with Reuben according to their armies, and the leader of the children of Reuben shall be Elizur the son of Shedeur."
Numbers 2:10
Surrounding context
2:9 "All who were numbered according to their armies of the forces with Judah, one hundred and eighty-six thousand four hundred--these shall break camp first.
2:10 "On the south side shall be the standard of the forces with Reuben according to their armies, and the leader of the children of Reuben shall be Elizur the son of Shedeur."
2:11 And his army was numbered at forty-six thousand five hundred.